org.apache.flink.streaming.api.transformations

Class UnionTransformation<T>

java.lang.Object

org.apache.flink.api.dag.Transformation<T>

org.apache.flink.streaming.api.transformations.UnionTransformation<T>

Type Parameters:

T - The type of the elements that result from this UnionTransformation

@Internal
public class UnionTransformation<T>
extends org.apache.flink.api.dag.Transformation<T>

This transformation represents a union of several input Transformations.

This does not create a physical operation, it only affects how upstream operations are connected to downstream operations.

Field Summary

Fields inherited from class org.apache.flink.api.dag.Transformation

bufferTimeout, DEFAULT_MANAGED_MEMORY_WEIGHT, id, idCounter, name, outputType, typeUsed, UPPER_BOUND_MAX_PARALLELISM

Constructor Summary

Constructors

Constructor and Description
UnionTransformation(List<org.apache.flink.api.dag.Transformation<T>> inputs) Creates a new UnionTransformation from the given input Transformations.

Method Summary

Modifier and Type	Method and Description
List<org.apache.flink.api.dag.Transformation<T>>	getInputs() Returns the list of input Transformations.
Collection<org.apache.flink.api.dag.Transformation<?>>	getTransitivePredecessors()

Methods inherited from class org.apache.flink.api.dag.Transformation

equals, getBufferTimeout, getCoLocationGroupKey, getId, getManagedMemoryWeight, getMaxParallelism, getMinResources, getName, getNewNodeId, getOutputType, getParallelism, getPreferredResources, getSlotSharingGroup, getUid, getUserProvidedNodeHash, hashCode, setBufferTimeout, setCoLocationGroupKey, setManagedMemoryWeight, setMaxParallelism, setName, setOutputType, setParallelism, setResources, setSlotSharingGroup, setUid, setUidHash, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

UnionTransformation

public UnionTransformation(List<org.apache.flink.api.dag.Transformation<T>> inputs)

Creates a new UnionTransformation from the given input Transformations.

The input Transformations must all have the same type.

Parameters:

inputs - The list of input Transformations

Method Detail

getInputs

public List<org.apache.flink.api.dag.Transformation<T>> getInputs()

Returns the list of input Transformations.

getTransitivePredecessors

public Collection<org.apache.flink.api.dag.Transformation<?>> getTransitivePredecessors()

Specified by:

getTransitivePredecessors in class org.apache.flink.api.dag.Transformation<T>